condition mean min max Sterile Leaflet 1.8517696666666668 0.317848 4.39593 Fertile Leaflet with Sori 0.09766066666666667 0.0 0.292982 Primary Rachis 0.0 0.0 0.0 Secondary Rachis 0.0 0.0 0.0 Petiole 0.0 0.0 0.0 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0